 {\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi} \begin{tabular}         {@{\extracolsep{4pt}}l*{10}{>{\centering\arraybackslash}m{1.6cm}}@{}}          \toprule          &\multicolumn{3}{c}{\textbf{Hourly production}}  &\multicolumn{3}{c}{\textbf{Attentiveness index}}  &\multicolumn{3}{c}{\textbf{Attendance}} \bigstrut       \\         \cline{2-4} \cline{5-7} \cline{8-10} \addlinespace                               &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         &\multicolumn{1}{c}{(6)}         &\multicolumn{1}{c}{(7)}         &\multicolumn{1}{c}{(8)}         &\multicolumn{1}{c}{(9)}         \\ \midrule Piece rate          &       0.020\sym{**} &                     &                     &      -0.013         &                     &                     &       0.000         &                     &                     \\                     &     (0.010)         &                     &                     &     (0.010)         &                     &                     &     (0.006)         &                     &                     \\ \addlinespace Log(piece rate)     &                     &       0.058\sym{**} &                     &                     &      -0.035         &                     &                     &       0.002         &                     \\                     &                     &     (0.028)         &                     &                     &     (0.029)         &                     &                     &     (0.017)         &                     \\ \addlinespace Piece rate = Rs. 3  &                     &                     &       0.024         &                     &                     &      -0.004         &                     &                     &       0.014\sym{*}  \\                     &                     &                     &     (0.018)         &                     &                     &     (0.024)         &                     &                     &     (0.008)         \\ \addlinespace Piece rate = Rs. 4  &                     &                     &       0.040\sym{**} &                     &                     &      -0.025         &                     &                     &      -0.000         \\                     &                     &                     &     (0.020)         &                     &                     &     (0.020)         &                     &                     &     (0.012)         \\ \midrule N: worker-hours     &       4,374         &       4,374         &       4,374         &       4,373         &       4,373         &       4,373         &         898         &         898         &         898         \\ \bottomrule
P-val: equality of coefficients &&&&&&&&& \\
Piece rate in (1) and (4) & .001 &&&&&&&& \\
Log(piece rate) in (2) and (5) && .001 &&&&&&& \\
Piece rate = Rs. 3 in (3) and (6) &&& .211 &&&&&& \\
Piece rate = Rs. 4 in (3) and (6) &&& .001 &&&&&& \\
\bottomrule
\end{tabular}
}